Fiber-optic voltage sensor
US4939447A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Nov 10, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/0885
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber-optic voltage sensor comprises at least one fiber-optic, piezoelectric sensor element (2a, 2b, 2c, 2d), which measures a predeterminable directional component of a local electric field. One or more than one piezoelectric sensor elements (2a, 2b, 2c, 2d) are arranged serially between two ends of the fiber-optic voltage sensor, each piezoelectric sensor element (2a, 2b, 2c, 2d) respectively measuring a directional component of a local electric field, which component lies parallel to a path element assigned to it, the path elements as a whole forming an open polygon connecting the two ends of the fiber-optic voltage sensor. Each sensor element (2a, 2b, 2c, 2d) has a gain which is proportional to a length of the path element assigned to it. In a preferred embodiment, the piezoelectric sensor elements (2a, 2b, 2c, 2d) are connected by spacers (3a, 3b, 3c). Preferably, the piezoelectric sensor elements (2a, 2b, 2c, 2d) are disc-shaped and the spacer (3a, 3b, 3c) are cylindrical and form as a whole a cylindrical body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.